Electron-discharge device



' 1 616 184 Feb 1,1927. T. R GRFFITH 9 a ELECTRON DISCHARGE DEVICE Filed Oct. 29. 1923 mama m. 1, 1927.

UNITED STATES PATENT OFFICE.

mom a. ems-n11, or Doves, New messy, assrenon r wssrnsn nmc'rnrc comm, mconronarnn, or Newman, 1:. Y., a conromrrou or new You Emerson-Dreamer nnvrcn.

Application filed October 29, 1928. Serial No. 671,816.

This invention relates toauelectrorli charge devices, more especi y, to one of this character capable of handling large 'fl-molmts of wer, and has for 1ts obJect 5 to improve e electrode supporting structure thereof.

This object is attained by firovldmg a framework comprising a plum ty of rods connected together by a plurality of collars.

lc A fine wire is wrapped around the rods, each turn of the wire being supgorted by each of said rods through the m 'um of clamping means attach to the rods by the col- Referring now to the drawings, Fig. 1

an electron. discharge device, partially broken away, embodymg the mvention, and Figs. 2 views of f means. a The enclosing vessel of the device comprises a metallic cu shaped member 10110 the rim of which is a glass portion 11, the portion 10 serving as e anode of the device. A rod 12 is supported. from the stem ofthe device (not shown) and extends into the anode. Attached to this rod are a pair of insulating blocks 13 and 14 between which is sup rted the filament 15. A plurality of ro 16 preferably three 80 in n are'supported from the stem of the device (not shown) and extend substantially the full length of the anode 10. At their free endsthe rods are connected together by means of-a mg or collar 17 and .5 are wise connected near the rim of the anode by a collar 18. Eachof the collars is provided with a pair of inwardly proj fiaps 19, in. each-of which flaps.

is p. vi ed an a e .to receive a rod (0 16. @he inner on of the flaps 19 are. bent parallel to the suriace of the collar to form a substantially box-shaped member through which a rod lfi extends. wire 20 is passed around each rod 16 over the flaps 19 and to back aroimd the rod 16, to the opposite side o the,box-likeportion,- 'where the 'ends are twisted. that to tie the collar securely toathe; rod '1 A wire helix'22 surrounds the rods 16 dorming a grid electrode21, each turnoithe helix being attachedto each rod.

According to theflisclosure in Fig s.2 and a 3, alo 'tudinal groove is provided in 16. each 0f tll$ef grooves is a rod 24 to whi'ch are attached the harm of-the 22 'byf-nieans each to 8, inclusive, are detail Y in the former. Adod 28 is alsorovided -'to .clamp the turns of the wire to the red 28 being pressed into the groove helix into the groove and clamping said portion between it and the bottom of the groove.

.27, forcing a P01131011 of each turn of the 1 Each of the rods 16 is screw threaded to provide ooves to lay the turns of the helix 22 for eterminingthe space relation between them. The rods 28 are held in the grooves by being passed-under the collars 17 and18.

Still anothertype .of connection is disclosed 'in Figs. 6 and 7. -According to this disclosure the rods 16 are not'grooved but are screw threaded throughout their length. The turns of the helix are laid in the threads to determine their space relation, and a. curved clamping member 30 laid over them to hold thein'in the threads. This clampin member is held in place by havin 1ts ends pass through the a ertures in the. ap's 19 of the collars 17 an 18.

. What-is claimed is: i g

1. A grid electrode comprising a plurality of grooved supporting rods, a. wire helix surrounding sai rods, means lying in said groovesand extending the full length thereof for attaching the turns of the helix thereto, and a air of collars connecting said rods 7 and hol g the .ends of said. attaching 'means in said grooves. s v

.2. A grid electrode comprisinga pluralitg of supporting rods, a pair of collars, aligne projections extending from the edges of said collars, each of said projections being apertnred to receive a supporting rod, the end of each projection of said pairs of projections being bent toward the projection aligned therewith, a tie wire passing around ea I of saidsu porting rods and over said 'prtg'ections, an ,a wire helix surrounding wsai' ,su"ppo rtingand supported thereby.

3. A grid electrode comprising a plurality of grooved supporting members, a wire helix surrounding said members, a rod arranged in each of said grooves, tie Wires for attaching each turn of said helix to said rods, and a pair of collars connecting said supportin members and clamping said rods in saic grooves.

4:. A grid electrode comprising a plurality 10 of grooved supporting members, a wire helix surrounding said supporting members, a rod clamping a portion of each turn of said helix in the groove of one of said supporting members and a pair of collars connecting the supporting members and clamping said rods in said grooves.

In witness whereof, I hereunto subscribe my name this 26 day of October A. D., 1923.

THOMAS R; GRIFFITH. 

